Conflagration, the culminating quest of the Goblin Camp quest line in the High Pass of the Misty Mountains is one of the best quests in the game for me, mainly for it's comedic value. Others are cool due to something nerdy stuck in regarding lore, but this one always makes me laugh and entertains me to no end. :P I'll make a cut here to not spoil just in case.

The fiery mixture exploding and catching the dwarf's beard on fire is funny, but I always cannot wait to go tip over the goblin firepots and watch the explosions erupt around the goblin camp. I really wish there was a way to repeat this quest aside from leveling up another alt.woohoo, look at that goblin fly! :D